KKT chillers nBoxX 1.5, Operating Instruction, Page: 10 / 48

10 / 48 83000902.Ka
3.1.1 3.1.1 3.1.1 3.1.1 Controller Controller Controller Controller
The cooling units are fitted with a controller for setting the functions of the cooling unit. Operating
states are displayed using a display unit and parameters can be set using buttons.
3.1.2 3.1.2 3.1.2 3.1.2 Safety devices Safety devices Safety devices Safety devices
The cooling unit has a pressure switch in accordance with EN 12263, tested at component level, in
the refrigerant circuit; this device is set to the maximum permissible pressure (PS). An automatic
reset device ensures that the system continues to work after the pressure drops (auto-reset).
Temperature monitoring prevents the evaporator coil from icing over. If there is a risk of icing, the
compressor switches itself off and automatically switches itself back on again at higher tempera-
tures.
The refrigerant compressor motor and the fan motors are equipped with thermal winding protection
switches against excess current and excess temperatures.
To ensure that the compressor runs reliably and without problems (for example after reaching the
set-point temperature or after a fault), the compressor automatically switches back on after a delay
of 180 seconds.
The cooling unit has two integrated floating fault signal contacts (see circuit diagram of the relevant
unit type, sections 13.4 and 13.5). Individual fault messages can be interrogated via an integrated
Sub-D socket using an external PLC controller.
3.2 3.2 3.2 3.2 Proper us Proper us Proper us Proper use e e e
The Nano-Line has been developed and designed in accordance with the state of the art and the
recognised rules governing safety. Nevertheless, if used improperly, they may pose a threat to life
and limb or cause damage to property. The Nano-Line units described in these instructions must only
be used for cooling water or a water-glycol mixture. If using other fluids (e.g. de-ionised water),
please refer to the technical specifications contained in the appendix, or contact the manufacturer.
Under no circumstances should the limit values specified in the technical specifications be ex-
ceeded.
Explosion hazard!
Explosion hazard! Explosion hazard!
Explosion hazard!
The use of the cooling unit for cooling inflammable or explosive substances is prohibited. The use of the cooling unit for cooling inflammable or explosive substances is prohibited. The use of the cooling unit for cooling inflammable or explosive substances is prohibited. The use of the cooling unit for cooling inflammable or explosive substances is prohibited.